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Using a die in place of threaded coupler?

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Using a die in place of threaded coupler?

Old 09-30-2007, 07:35 PM
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Gringo Flyer
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Default Using a die in place of threaded coupler?

I use ball links on almost all of my control surfaces and am really happy with how clean they install. However, I still haven't found a setup to use on the non threaded end of the rod that I really like.

I have used solder clevises or soldered on a threaded coupler. I generally prefer the threaded coupler because I like being able to adjust on the clevis/control horn end.

I was wondering if its practical to thread the other end of the pushrod with a die http://www2.towerhobbies.com/cgi-bin...&I=LXR767&P=ML.
In the long run using a die would be more economical than the threaded couplers and a cleaner install as well.

I have never used a die, is it practical for a 4-40 or 2-56 sized pushrod?
Old 09-30-2007, 07:44 PM
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RCKen
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Default RE: Using a die in place of threaded coupler?

Gringo,
It's not going to work if you try to cut threads in rod. The clevises that you want to thread onto the rod are designed for threads that are rolled into the metal, as opposed to cutting them with a die. When threads are rolled the material is transformed and will actually be a little bit larger than the rod itself. When you cut threads with a die you are actually removing the material, and the edge of the threads will be even with the outside of the rod. When you thread a clevis on this it is going to be loose and may actually slip in use. You'll be better off by just buying pre-threaded rods.

Ken
Old 09-30-2007, 08:04 PM
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Default RE: Using a die in place of threaded coupler?

I guess I'll just stick to ball links and threaded couplers then.

It would be great if the die was practical though.
Old 09-30-2007, 11:49 PM
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Default RE: Using a die in place of threaded coupler?

Just to be clear.. if you try to thread the typical pre threaded rods it won't work.. As RC Ken said the rods are to small for full depth threads.

It can be done with the correct size rods..

for 2-56 you need larger than .086 3/32 is .093
for 4-40 you need larger then .112 1/8 is .125

The pre rolled thread rods you buy are around .070

don't try to cut threads on music wire.. It's to hard.. I ruined a 4-40 die and twisted up the rod trying.

Some good stuff on cutting your own here
http://www.rodchuck.com/weldnrod.htm

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